How do I sign out or change my nickname on Game Center?

On iOS 7 and higher, please follow these steps: Open the ‘Settings’ app on your deviceScroll down to the Game Center iconSign in/out by tapp...

How can I disable the Game Center ‘Welcome back’ banner and/or login prompt?

The ‘Welcome Banner’ shows up each and every time you open the app when you are logged into Game Center. To disable the login prompt, discon...